CVE-2022-31017
LOWDescription
Zulip is an open-source team collaboration tool. Versions 2.1.0 through and including 5.2 are vulnerable to a logic error. A stream configured as private with protected history, where new subscribers should not be allowed to see messages sent before they were subscribed, when edited causes the server to incorrectly send an API event that includes the edited message to all of the stream’s current subscribers. This API event is ignored by official clients, but can be observed by using a modified client or the browser’s developer tools. This bug will be fixed in Zulip Server 5.3. There are no known workarounds.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 43% of all known CVEs.
References
Related Vulnerabilities
Other vulnerabilities affecting zulip, ordered by exploit likelihood.
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-43799 | High | 8.6 | 5.4% | - | Fix |
| CVE-2021-41115 | Medium | 4.3 | 1.7% | - | Fix |
| CVE-2022-24751 | Medium | 5.4 | 1.0% | - | Fix |
| CVE-2022-35962 | High | 8.0 | 0.9% | - | Fix |
| CVE-2021-3967 | High | 8.8 | 0.8% | - | Fix |
| CVE-2022-31168 | Medium | 5.4 | 0.8% | - | Fix |
Common questions
How do I fix CVE-2022-31017?
Upgrade zulip to 5.3 or later.
Is CVE-2022-31017 being actively exploited?
Not that we know of. CVE-2022-31017 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.54% is the estimated probability that it will be exploited in the next 30 days. That is higher than 43% of all scored CVEs.
How severe is CVE-2022-31017?
CVE-2022-31017 has a CVSS v3 base score of 2.0, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2022-31017 affect?
Published advisories record a fix for zulip (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.